T e c h n i c a l
R e p o r t

FeatureSANYO DENKI's Specialty Technologies

N o . 4 8
N o v e m b e r
2 0 1 9■E N G L I S H

1960
Ueda Works48

November
2019
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COLUMN
Cover image:

Ueda Works
1960

Before daybreak on June 4, 1960, a fire broke out at Ueda Works.
Fanned by a strong wind, the fire engulfed and destroyed the wooden
main factory building and production facilities. Our company lost its
main factory and suddenly faced an existential crisis, but all
employees, led by the president, worked together to restore theirworkplaces. As a result, the factory was restored in only two months.
This incident led to the replacement and expansion of our production
facilities. Together with Kawaguchi Works that was completed aroundthe same period, our production capacity was greatly increased.
Following reconstruction, large power supplies were mainly
produced at Ueda Works, including AC uninterruptible power supplies,
high-frequency motor generators, and constant-voltage constant-frequency
power supplies. Demand for uninterruptible power supplies increasedin various industries such as national rail, electric power generation,and petrochemical. Moreover, we further expanded into new markets
such as for computers and broadcast stations.

48

November
2019

https://www.sanyodenki.com

Published in Japan on November 15, 2019, by SANYO DENKI CO., LTD.
Published semi-yearly
3-33-1 Minami-Otsuka, Toshima-ku, Tokyo 170-8451, Japan
Phone +81 3 5927 1020
Publisher Shigeo Yamamoto
Editorial Board Members:
Nobumasa Kodama
Editor-in-Chief
Satoru Onodera
Managing Editor
Takashi Kobayashi
Secretariat
Shiho Tsukada
Secretariat
Kenta Nishimaki
Haruhisa Maruyama
Masakazu Uchida
Hirofumi Nishizawa
Hideki Netsu
Daigo Kuraishi
Hiroshi Miyazaki
Rieko Komine
Copyright © 2019 SANYO DENKI CO., LTD.
All rights reserved.
No part of this publication may be reproduced in any manner whatsoever without written
permission from SANYO DENKI.
All company and product names used in this publication are trademarks or registeredtrademarks of their respective companies.

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48
November 2019

SANYO DENKI TECHNICAL REPORT
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SANYO DENKI’s Specialty Technologies

Operating Officer Shigejiro Miyata

Feature: SANYO DENKI’s Specialty Technologies

13■ Cooling Systems Division

Cooling Systems Specialty Technologies
for Achieving High Airflow and High Static Pressure

Hiromitsu Kuribayashi ............ 3

Development of San Ace Controller, an IoT Productfor Remote Fan Control and Monitoring Naoki Murakami and Others ................................... 8
Splash Proof Blower San Ace 97W 9W1B Type

Koji Ono and Others ............................... 14■ Power Systems Division

Specialty Technologies
in SANUPS Power Systems Products

Takeshi Hama ....................................................... 19

Development of the Small-Capacity UPS
SANUPS A11M Series Hiroyuki Hanaoka and Others .................................................................... 22
Development of the SANUPS W73A
Grid-Connected Isolated Type Makoto Ishida and Others .......................................................... 28■ Servo Systems Division

Specialty Technologies
for Efficiently Producing Servo System Products
SANMOTION K Series DC Servo Motor

Shusaku Magotake and Others ............ 33

Daigo Kuraishi and Others ...................................... 39

SANYO DENKI’s
Specialty Technologies
Shigejiro Miyata Operating Ofﬁcer

The world’s average annual temperature rose by 0.85˚C over the past
100 years. In particular, the temperature rise in the Northern hemisphere wasnotable, especially in high-latitude locations close to the North Pole. In Japanalso, the temperature rose by 1.21˚C over the past century, with many of theyears since 1990 being particularly hot.
I too personally feel that the climate has changed significantly, such as in
the abnormal weather we have seen over the past few years.
Various gases are linked to global warming, however, carbon dioxide has
the greatest impact, accounting for about 76% of greenhouse gases. Since theindustrial revolution, fossil fuel use has been increasing, consequently leading
to an increase in concentration of carbon dioxide in the atmosphere.
Greenhouse gas emissions have continued to increase, and are currently
more than 50% higher than in 1990. Moreover, global warming is bringing
about long-term changes to the entire global climate system, and if immediate
action is not taken, there is a chance the situation will be irreparable. In the
Paris Agreement in 2015, it was agreed that there was a need to limit global
temperature rise this century to under 2˚C above pre-industrial levels, and to
pursue efforts to limit the temperature increase even further to 1.5˚C. There
was also common recognition of the need for decarbonization.
This was indicated in Goal 13 of the 17 Sustainable Development Goals(SDGs),* which states “Take urgent action to combat climate change and its
impacts.” These were set at the United Nations summit as part of the 2030
Agenda for Sustainable Development, and are to be achieved in the period
between 2016 and 2030.
We, SANYO DENKI Group, have set development goals at our design
departments as part of our 8th Mid-term Management Plan. Two such goalsare:(1) C reate products with performance that deliver new value for customers,
making them happy and helping them realize their dreams.
(2) B ecome specialists in change. Find new value in change, turn change
into value for our customers, generate change in the market through thestrength of the entire group, and continuously offer new value in a changing
world.

1

SANYO DENKI Technical Report No.48 November 2019

Specifically, the following product features were set as development targets:
eco-efficiency, low loss, high airflow, high static pressure, low noise, water
resistance, oil resistance, salt resistance, and a wide temperature range.
These targets of our design departments are consistent with Goal 13 of
the Sustainable Development Goals (SDGs). The eco-efficiency and low lossfeatures can reduce the energy consumption of our products. Features such as
high airflow, high static pressure, low noise, water resistance, oil resistance,
salt resistance, and a wide temperature range can simplify the structure of ourcustomers’ equipment. Also, long service life, vibration resistance, and G-force
resistance can extend the maintenance cycle of our products, contributing toresource recycling and energy consumption reduction.
Moreover, as a product that can replace fossil fuels, we offer renewableenergy inverters that produce energy with low environmental impact, such as
photovoltaic, wind, and hydroelectric energy. These goals are consistent with
Goal 7 of the 17 SDGs — Affordable and Clean Energy.
This report features our technologies used in new products and newtechnologies developed based on a long-term perspective as “SANYODENKI’s Specialty Technologies.” Through these activities and technologicaldevelopments, we will build a brand trusted by customers around the world.
Through our corporate activities, we will contribute to the conservation of the
global environment and prosperity of the human race.
* Sustainable Development Goals (SDGs) are the successors of the Millennium
Development Goals (MDGs) set in 2001, and are global targets to be achievedin the period between 2016 and 2030 as part of the 2030 Agenda for Sustainable
Development formulated at the United Nations summit in September 2015.
Reference(1) Ministry of Foreign Affairs of Japan ̶ JAPAN SDGs Action Platform
https://www.mofa.go.jp/policy/oda/sdgs/index.html (2019.9.19)

SANYO DENKI Technical Report No.48 November 20192

Feature: SANYO DENKI’s Specialty Technologies

Cooling Systems Specialty
Technologies for Achieving High
Airflow and High Static Pressure
Hiromitsu Kuribayashi

1. Introduction

data volume handled by servers have been rising year by year,
and the heat generation of each device has increased along

Under our corporate philosophy of “Aim to help allwith these changes. Moreover, the density of components

people achieve happiness,” SANYO DENKI has set three

inside devices is increasing, so fans must be compact while

technical concepts. These are (1) technologies for protecting

also having high airflow and high static pressure.

the global environment, (2) utilizing new energy, and (3)conserving energy. Based on these concepts, we have always
developed San Ace cooling fans with a certain goal inmind. The goal is to realize a quiet fan with a long lifespan,
minimal power consumption, and the highest airflow vs.
static pressure characteristics possible.
This article will introduce our specialty technologies usedin the development of San Ace fans to achieve high airflow
and high static pressure products.

2. Background to the Demand for High
Airflow and High Static Pressure

Fig. 1 Example of a rack mount server(Photo courtesy of Super Micro Computer, Inc.)

In recent years, driven by the advancement of cloudservices, demand has been growing for rack mount servers(Fig. 1) used in data centers. Our fans are used in many ofthese servers, which are representative of ICT equipment.

CPU
Fan

Generally speaking, rack mount servers are designed tobe mounted in 19-inch wide racks, as standardized by theAmerican Electronic Industries Alliance. Heights arePowersupplyMemoryHDD

standardized in multiples of U (44.45 mm), such as 1U, 2U,
and 4U. Racks are the mainstream for server shape, and canaccommodate stacks of up to forty two 1U servers so spacein data centers can be used efficiently.

Fig. 2 Example of a 1U server(Photo courtesy of Super Micro Computer, Inc.)As with regular servers used in offices, rack mountservers have a CPU, memory, HDD, and power supply. To
ensure stable operation, it is necessary to not exceed theFan

manufacturer’s guaranteed temperature for each device,
and using fans for cooling is a common approach. Figure 2
depicts an example of a 1U server. There are eight 40 ×
40 mm fans in the center of the device, and there is also a 40
× 40 mm fan in the power supply, as shown in Figure 3.
With the spread of the internet, the processing speed and3

SANYO DENKI Technical Report No.48 November 2019

Fig. 3 Example of a 1U power supply(Photo courtesy of Compuware Technology Inc.)Cooling Systems Specialty Technologies for Achieving High Airflow and High Static Pressure

3. Specialty Technologies
Dynamic blade rotational direction

3.1 Specialty technology (1):
Axial fan with static blades
Let me explain the transition to high airflow and highstatic pressure demanded from fans used in rack mountservers. Generally speaking, to increase fan airflow, it isnecessary to either increase motor speed or increase blade
size. Moreover, to increase static pressure, it is necessary
to either increase motor speed or alter the shape of theblades and frame to ones where static pressure can beeasily secured. Meanwhile, for 1U servers, there is theaforementioned height restriction of 44.45 mm, so fan heightcannot exceed 40 × 40 mm.
1U servers released in the late 1990s were equipped withour 40 × 40 × 28 mm 9P type axial fans (hereinafter 40 × 40
× 28 mm fan). Since then, whenever a new server model wasdeveloped there was a demand for higher airflow. This could

Dynamic blade side

Static blade side
Airflow direction

Fig. 5 A vector diagram of the air in a fan
with static blades

be handled by increasing fan speed through minor changes
such as changes to the drive circuit.

However, by 2003, it had become difficult to effectively
achieve the target airflow vs. static pressure characteristics

9P type (without static blade)

simply through increased motor speed. We believed oneof the reasons for this was that the rotating air from the
dynamic blades was not contributing to axial airflow, butrather causing the flow created by the dynamic blades to lose
energy.
Hence, as shown in Figures 4 and 5, we placed backward
static blades in front of the dynamic blades to change therotating air flow to the axial direction and suppress energy
loss. The angle of the rotational component created by adynamic blade varies between the area near where the blade

Dynamic bladeis attached and the area near the blade tip, so we designed astatic blade that match these angles. Moreover, because theoverall frame thickness was 28 mm, which was insufficient

Airflow direction

to secure enough thickness of static blades in the axial
9HV type (with static blade)direction. As such, we increased the number of static bladeswith the aim of increasing the rectifying effect.
Furthermore, we optimized the overall blade/frame
shape, magnetic circuit, and drive circuit to minimize power
consumption and noise level while maintaining the target
airflow vs. static pressure characteristics.
Regarding this axial flow fan with static blades, wedeveloped the 9GV type, 9GA type, and 9HV type for theStatic blade

Dynamic blade

40 × 40 × 28 mm size in 2008, 2012, and 2015, respectively.
The performance of these is shown in Table 1 and Figure
6. Compared to the 9P type (109P0412H3013) developedin 1987, the 9HV type developed in 2015 has a maximum

Airflow direction

airflow around 2.6 times greater, and a maximum staticpressure around 10.7 times greater.

Fig. 4 Example of structures for our 40×40×28 mm fans

SANYO DENKI Technical Report No.48 November 20194

Table 1 Example of general specifications of our typical 40 × 40 × 28 mm fans
Model no.

Speed[min-1]Max. airflow[m3/min]

109P0412H3013

8,700

0.32

109P0412K3013

15,5000.59

Max.
static pressure
[Pa]

Power
consumption[W]

SPL[dB(A)]

102.9

2.34

37

340.0

6.6

50

9GV0412K301

16,500

0.76

415.0

10.08

58

9GA0412P3K01

22,000

0.81

799.0

11.04

61

9HV0412P3K001

25,000

0.83

18.3

65

1,100

significantly improved and we were able to solve the issue of1200

static pressure drops in specific zones characteristic of axial

Static pressure[Pa]1000

flow fans.

800
600

Pressure recovery,
collision reduction

9HV0412P3K001

Axial component

9GA0412P3K01

400

9GV0412K301
200

109P0412K3013

109P0412H3013
0

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Airflow[m3/min]Fig. 6 Example of airflow vs. static pressure
characteristics of our typical 40 × 40 × 28 mm fansFig. 7 Illustration of Counter Rotating Fan flow

3.2 Specialty technology (2):Counter Rotating Fan

2000

1600

density shift in 1U servers, the cooling performance of the1400

emerged where two fans were being used in series. When
two axial fans are arranged in series in the same rotational
direction, similarly to the axial fans without static blades
discussed in Section 3.1, rotational components remain.
Hence, collision loss is caused by the flow produced by
the inlet fan’s dynamic blades and that of the outlet fan’s
dynamic blades. As a result, airflow vs. static pressure
characteristics improved slightly, but it could not sufficiently

Static pressure[Pa]With the higher heat generation and higher component
40 × 40 × 28 mm fan was no longer sufficient, and cases

9CRH0412P5J001
One 40 × 40 × 56 mm Counter Rotating Fan

1800

9HV0412P3K001
Two 40 × 40 × 28 mm fansin series

1200
1000
800
600

9HV0412P3K001
One 40 × 40 × 28 mm fan

400
200
0

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Airflow[m3/min]Fig. 8 Example of airflow vs. static pressure
characteristics of our typical 40 × 40 mm fanssatisfy the performance requirement.
In light of this, we developed the Counter Rotating Fan in

The 40 × 40 × 56 mm Counter Rotating Fan 9CRH type2004 as a counter rotating axial flow fan comprising an inlet

developed in 2017 (shown in Figure 9), has a maximum

fan and an outlet fan where the respective dynamic blades

airflow 1.3 times greater and maximum static pressure

rotate in opposite directions. As shown in Figure 7, by

3.3 times greater than those of the 9CR type developed ininstalling static blades shaped to smoothly receive the flow

2004. Furthermore, as shown in Figure 10, flow straightness

from the inlet dynamic blades, we achieved a configuration

is dramatically improved compared to when an axial

in which the rotating flow was converted to axial flow by the

fan is used in isolation or in a series of two. By releasing

outlet dynamic blades. Consequently, as Table 2 and Figure

these Counter Rotating Fans, we could offer customers

8 show, the airflow vs. static pressure characteristics were

unprecedented new solutions to meet their needs for higher
airflow and higher static pressure.

5

SANYO DENKI Technical Report No.48 November 2019

Cooling Systems Specialty Technologies for Achieving High Airflow and High Static Pressure

Table 2 Example of general specifications of our typical 40 × 40 mm fansSpeed[min-1]Model no.

Inlet

9HV0412P3K001
One 40 × 40 × 28 mm fan

OutletMax. airflow[m3/min]Max. staticpressure
[Pa]

Power
consumption[W]

SPL[dB(A)]

0.83

1,100

18.3

65

25,00025,20030,900

0.87

1,840

28.0

77

9CRH0412P5J001
One 40 × 40 × 56 mm Counter Rotating Fan

29,50025,500

0.93

1,700

30.24

70

100

9HV0412P3K001
Two 40 × 40 × 28 mm fans in series

0

9CRH type

100

Inlet fan

50

0

0

100

200

300（mm）

100

40 × 40 × 28 mm 9HV type fan(25,000 min -1)

100

0Outlet fan

50

0

0

100

200

300（ mm ）Two 40 × 40 × 28 mm 9HV type fans in series(Inlet fan 25,200 min -1/outlet fan 30,900 min -1)

Airflow direction

Inletdynamic
blade

100

Outletdynamic
blade

0

100

Static blade

Fig. 9 Example of structure
for our 40 × 40 × 56 mm Counter Rotating Fan

50

0

0

100

200

300（ mm ）40 × 40 × 56 mm Counter Rotating Fan 9CRH type
(Inlet fan 29,500 min -1/outlet fan 25,500 min -1)

Fig. 10 Wind speed distribution(in free air and at rated voltage)

SANYO DENKI Technical Report No.48 November 20196

Cooling Systems Specialty Technologies for Achieving High Airflow and High Static Pressure

Furthermore, in addition to the 40 × 40 mm size, ourcurrent lineup has 36 × 36 mm, 60 × 60 mm, 80 × 80 mm, 92
× 92 mm, 120 × 120 mm, and ø172 mm Counter Rotating
Fans. These are being actively adopted in a variety ofindustrial equipment, such as ICT equipment requiring
compact fans with extremely high operating airflow.

Reference(1) Yukio Harada: Fluid Machinery
SI Unit Version, Asakura Publishing (1986)(2) Yoshihiko Aizawa: Cooling System Technology That Changes The
Conventional Trend
SANYO DENKI Technical Report No.16 (2003)(3) Honami Osawa and Others: San Ace 40 Counter Rotating Fan

4. Conclusion
This article introduced our specialty technologies forachieving high airflow and high static pressure used in
the development of our San Ace fans, with a focus on the

SANYO DENKI Technical Report No.16 (2003.11)(4) Katsumichi Ishihara and Others: High Airflow, High Static
Pressure Fan San Ace 40 GV type
SANYO DENKI Technical Report No.20 (2005.11)(5) Shuji Miyazawa and Others: High Static Pressure Counter

technologies used for fans with static blades and Counter

Rotating Fan San Ace 40 9CRH type

Rotating Fans. The development of these technologies

SANYO DENKI Technical Report No.45 (2018.5)

enables us to deliver optimal solutions to our customers(6) Super Micro Computer, Inc.: Supermicro RSD

who face cooling issues. SANYO DENKI will continue tohttps://mysupermicro.supermicro.com/user (2019.8.21)

strive toward technological development so that we can keep(7) Super Micro Computer, Inc.: Super Storage 1029P-NES32R

offering solutions matching our customers’ concerns.

https://mysupermicro.supermicro.com/user (2019.8.21)(8) Compuware Technology Inc.: 80 PLUS Platinum 1600W CRPS
CPR-1621-7M1
http://www.compuware-us.com/products_show.php?recno=83(2019.8.21)

Author

Hiromitsu Kuribayashi
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

7

SANYO DENKI Technical Report No.48 November 2019

New Product Introduction

Development of San Ace Controller,
an IoT Product for Remote Fan Control
and Monitoring
Naoki Murakami

Hironori Ogihara

Soma Araki

Masashi Murakami

Hikaru Urushimoto

Masahiro Minamoto

Honami Osawa

1. Introduction
In recent years, IoT (Internet of Things) has spreadthroughout many fields. IoT-enabled devices can be
operated and monitored remotely via the internet, offering
customers and users many benefits such as accumulating
operating data on a cloud server to use for purposes such as
preventive maintenance and product development.
Fans are a vital part of the devices in which they are used,as they enable stable operation. As such, IoT products thatenable remote monitoring and preventive maintenance ofFig. 1 San Ace Controller Fig. 2 Dedicated sensor

fans are required.
135±1
121±0.5

4.5±
0.3

3

device that can automatically control fans to operate at the

4-ø

0.
.5±

To achieve even higher energy efficiency and lower SPL, aø8pressure level) are always important concerns for devices.

4-

Moreover, high energy efficiency and low SPL (sound

50±1

Controller, an IoT product that enables remote control
and monitoring of fans with the PWM control function

180±1

To satisfy these requirements, we developed the San Ace

166±0.5

proper speed for a given situation is required.

(hereinafter “fan”).
This article will provide an overview and introduce thefeatures of the San Ace Controller, it’s dedicated sensors,
and the San Ace NET cloud service.

Fig. 3 San Ace Controller dimensions

2±0

.3

3

4-7.

0.
5±

3.

2.1 Appearance and Dimensions

4-

2. Outline of the New Product53±0.544±0.5Controller and its dedicated sensor respectively, while
Figures 3 and 4 provide the respective dimensions of the San

46±0.537±0.5Figures 1 and 2 show the appearances of the San Ace

San Ace Controller can be installed sideways, vertically, or
mounted on walls. Moreover, all connectors are positioned
in the front for easy wiring.

22±0.5

Ace Controller and its dedicated sensor.

Fig. 4 Dedicated sensor dimensions

SANYO DENKI Technical Report No.48 November 20198

2.2 Specifications
Tables 1 and 2 show the respective specifications of San
Ace Controller and the dedicated sensor.
It can control and monitor SANYO DENKI’s fans via a
network.

Table 1 San Ace Controller specifications
Model

9CT1-001

Rated voltage [V]

12/24/48 DC

Power consumption [W]

3.1(1)

Operating voltage range [V]

7 to 60 DC

Operating temperature range [˚C]

-20 to +70

Control function

Manual/AutomaticControl signal

PWM signal
High-level voltage (VOH): 3.3/5 V
Frequency: 25 kHz

Monitoring criteria

Fan speed, fan current, fan operation time, sensor detection value, external input

No. of connectable fans

Max. 4

Allowable fan connection
terminal current

5 A (per terminal)

No. of connectable sensors

Max. 4

Supported sensors

Temperature/humidity, barometric pressure, acceleration(2)External I/O

Communication

Input

Photocoupler-isolated input, ON: 15 to 28.8 VDC, OFF: 0 to 5 VDC

OutputPhotocoupler-isolated open-collector output, load voltage: 28.8 VDC or less, output
current: 0.1 A or lessWireless

IEEE802.11b/g/n, frequency 2.4 GHz(3)

Wired

Ethernet 10BASE-T, 100BASE-TX

Size [mm]50 (W) × 135 (D) × 180 (H)Mass [g]450Material

Case: Plastic(1) For use of this product alone, at 20˚C ambient temperature, (2) Dedicated sensor, (3) Supports channels 1 to 11

Table 2 Dedicated sensor specifications
Sensor type

Temperature/humidity

Barometric pressure

Accelerometer

Model

9CT1-T

9CT1-P

9CT1-A

Measurement range

Temperature: -20 to +70°C
Humidity: 20 to 85% RH(1)Barometric pressure: 800
to 1100 hPa

Acceleration: 0 to 60 m/s2 (2)Operating temperature range [˚C]

-20 to +70

Operating humidity range [% RH]

20 to 85(1)Size [mm]53 (W) × 46 (D) × 22 (H)Mass [g]35Material

Case: Plastic(1) Non-condensing (2)Total acceleration from 3-axes

9

SANYO DENKI Technical Report No.48 November 2019

Development of San Ace Controller, an IoT Product for Remote Fan Control and Monitoring

3. Product Features

3.3 Measuring and monitoring function

3.1 Network connection function

possible to measure and monitor the below criteria.

Regarding the connected fan and dedicated sensors, it is

San Ace Controller can be connected to a network either
by wired or wireless connection. Figure 5 shows an example

Fan: Speed, current value, operation timeof system configuration when connected to a network.

Dedicated sensors: Temperature, humidity,

Through its network connection function, San Acebarometric pressure, acceleration

Controller can be accessed from a device such as a computeror smartphone on a network to perform settings, control,

The threshold of each monitoring criterion can be set

and monitoring. Moreover, detected alarms can be received,

arbitrarily by the user. If measurement values deviate fromand stored measurement data and alarm history can bethese thresholds, the user is alerted of an abnormality via

downloaded. The Ethernet 10BASE-T and 100BASE-

email, a notification on a browser screen, an LED on theTX (wired) and IEEE802.11b/g/n (2.4 GHz) (wireless)main unit, and an external output. Measurement data andcommunication standards are supported.

alarm history are stored in the internal memory, and can bechecked through a web browser. Moreover, measurement

3.2 User interface

data and alarm history can be downloaded from a computer

San Ace Controller can be operated using the regular

as a csv file, then used for preventive maintenance, newweb browser installed in devices such as computers or

product development, and problem analysis. Figure 7 is ansmartphones. The user interface is designed to be user-

example of a measurement data screen.

friendly, and a validation function prevents input andFurthermore, an input signal from an external device

selection errors, making San Ace Controller easy to operateenables monitoring of the external device’s status, and thereeven for first-time users. Figure 6 shows an example of a

is a function to notify users with an alarm in the event of ansettings screen.

abnormality.

Equipment(Cloud server)

Controller

Devices

External I/O

FansInternet
Wireless
communication

LAN
Set/Control/Monitor
Data/Alarm

DC power supplyPC

Sensors

Fig. 5 Example of system configuration

SANYO DENKI Technical Report No.48 November 201910

Fig. 6 Example of a settings screen

Fig. 7 Example of a measurement data screen

3.4 Fan control function

3.4.2 Automatic control

San Ace Controller can control up to four fans. Both

Automatic control is a function to automatically adjust

manual control and automatic control methods are options.

fan speed in line with the measurement values of theconnected sensor. Automatic control is achieved using either

3.4.1 Manual control

a dedicated temperature/humidity sensor or barometer.

Manual control is a function to control fan speed by

Figure 8 shows connection and operation examples of

inputting an arbitrary PWM signal duty value into theautomatic fan control using temperature/humidity sensors.

connected fan. PWM signal duty can be set in increments ofIn this example, fans 1 and 2 are automatically controlled in

1%, so users can adjust to their desired fan speed.

accordance with the measurement values of temperature/humidity sensor A, while fans 3 and 4 are automaticallycontrolled in accordance with the measurement values oftemperature/humidity sensor B. The speeds of the fans are

11

SANYO DENKI Technical Report No.48 November 2019

Development of San Ace Controller, an IoT Product for Remote Fan Control and Monitoring

automatically adjusted so that the measurement values of

3.5 San Ace NET cloud service

temperature/humidity sensors A and B reach the preset

By using the San Ace NET dedicated cloud service,target values. Because automatic control enables users to

San Ace Controller can be set, controlled, and monitored

operate fans at the optimal speed, it is possible to suppress

on a computer, smartphone, or other device from a remote

SPL and power consumption caused by excessive fan speed.

location as long as there is an internet connection available.

Figure 8 is an example of using two sensors for the

Furthermore, San Ace Controller’s measurement data

automatic control of four fans, but it is also possible tois automatically transferred and saved to San Ace NET,

automatically control four fans with their own individual

meaning it can be used for data backup.

sensor at a different target value. It is also possible toautomatically control our Counter Rotating Fan andReversible Flow Fan.

4. Conclusion
This article has given an overview and introduced thefeatures of our San Ace Controller.

Fans 3, 4This is the industry’s first (1) IoT product realizing

Temperature/humidity
sensor B

remote control and monitoring of fans. It enables remotemonitoring of the fan’s operational status and sensor
measurement values, and stores the monitoring data in the
product or in San Ace NET. This enables such data to be
used for purposes such as preventive maintenance, newproduct development, and problem analysis.

Temperature/humidity
sensor A

Moreover, with the fan automatic control function,
excessive increase of fan speed can be prevented, thus
significantly contributing to the realization of high energy

Fans 1, 2

efficiency and low SPL in our customers’ equipment.
We wish to continue engaging in the development of new

7000

Operate at the speed required tomaintain the target value

6000

Fan speed [min-1]

5000

Fans 3 and 4 are automatically controlled
by temperature/humidity sensor B

Fans 3, 4

products to meet new requests of our customers that occur
with technological advancements.
(1) Based on our own research as of August 20, 2019.

4000
3000
2000

Fans 1, 2

1000
0Fans 1 and 2 are automatically controlled
by temperature/humidity sensor A

Fig. 8 Example of connection and operationof automatic control

SANYO DENKI Technical Report No.48 November 201912

Development of San Ace Controller, an IoT Product for Remote Fan Control and Monitoring

Authors

Naoki Murakami
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Hironori Ogihara
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Soma Araki
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Masashi Murakami
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Hikaru Urushimoto
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Masahiro Minamoto
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Honami Osawa
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

13

SANYO DENKI Technical Report No.48 November 2019

New Product Introduction

Splash Proof Blower
San Ace 97W 9W1B Type
Koji Ono

Toshiya Nishizawa

Kakuhiko Hata

Takahisa Toda

Masaki Kodama

Hiromitsu Kuribayashi

1. Introduction
Devices today, including battery packs, ventilation
systems, commercial kitchen equipment, and digital
signage, are becoming denser. Cooling of such equipment
is performed at a high static pressure range which cannot
be covered using axial flow fans, so demand for blowers
has grown. Moreover, these types of equipment are often
used outdoors, exposed to water, or close to people, so arealso required to have high waterproof performance and low
sound pressure level (hereinafter “SPL”).

Fig. 1 San Ace 97W 9W1B TypeTo meet these requirements, SA N YO DEN K I has
developed and launched the Splash Proof Blower San Ace
97W 9W1B type, which has high cooling performance in thehigh static pressure range (hereinafter “new model”).
This article will introduce the features and performanceof the new model.

3. Product Overview
3.1 Dimensions
Figure 2 shows the dimensions of the new model.
To maintain compatibility with existing products, the new

2. Product Featuresmodel has the same width and height dimensions as current
models.

Figure 1 shows the appearance of the new model.
The new model is our first blower with IP68-rated dustand waterproof performance.
Furthermore, it has high static pressure performancecompared to an axial flow fan of equivalent size.
The features of the new model are:3.2 Specifications
Tables 1 shows the general specifications for the newmodel.
There are two rated voltages to choose from 12 V, 24 V,
and each of these are available with speeds of 4,800 min-1(H speed), or 4,100 min-1 (M speed). Figure 3 shows the(1) High static pressure

airflow vs. static pressure characteristics of H speed, while(2) L ow power consumption and low SPL

Figure 4 shows the airflow vs. static pressure characteristics(3) IP68 dust- and waterproof performance.

of M speed. The airflow vs. static pressure characteristics(1)

differ for the two speeds, and they can be selected to suit the(1)Protection rating
The degree of protection (IP code) is defined by IEC(International Electrotechnical Commission) 60529 “DEGREESOF PROTECTION PROVIDED BY ENCLOSURES (IP Code).”(IEC 60529:2001)

heat generation situation of equipment. Moreover, because
the product is equipped with a PWM control function tocontrol fan speed to suit the situation, equipment power
consumption and noise levels can be decreased.
The new model has an expected life of 40,000 hours at
60°C (survival rate of 90%, run continuously at rated voltage
and normal humidity in free air).

SANYO DENKI Technical Report No.48 November 201914

(1.7)

8±1

25.7±0.3

(5)

.1
R49

)

41.4±0.347.4±0.3

AIR FLOW

95±1

(3.5)

(10

36.6±0.3

)

8.6
(1

(1.5)

(53.5)

Lead wire
AWG 24
UL 143030
0±30

4-ø4.5±0.3

29.6±0.3

.6)

1.6

ø5

(1.5)

(18

R6

97.1±1(49.7)
39.3±0.3(21)(12) 31.8±0.3(54.4)

33±1(2.3)

31.7±0.3

Rotating direction

Airflow direction

Fig. 2 Dimensions of the new model (unit: mm)Table 1 General specifications for the new model
Operating
Rated
PWM
Rated Rated
voltagevoltageduty cycle* current input
range
[V]
[%]
[A]
[W]
[V]

Model

9W1BM12P2H001

10.2
to
13.8

12
9W1BM12P2M001
9W1BM24P2H001

20.4
to
27.6

24
9W1BM24P2M001

100

1.30

Rated
Max. airflow
speed[min-1] [m 3/min] [CFM]

OperatingExpected
SPL temperaturelife[dB(A)]
range[h][Pa] [inchH 2O]
[˚C]

15.6

4,800

540

2.17

1.09

38.5

Max. staticpressure

58

20

0.14

1.68

1,500

0.32

11.3

51

0.20

30

100

0.90

10.8

4,100

0.93

32.8

380

1.53

55

20

0.14

1.68

1,500

0.32

11.3

51

0.20

30

100

0.65

15.6

4,800

1.09

38.5

540

2.17

58

20

0.07

1.68

1,500

0.32

11.3

51

0.20

30

100

0.45

10.8

4,100

0.93

32.8

380

1.53

55

20

0.07

1.68

1,500

0.32

11.3

51

0.20

30

40,000at 60˚C(70,000 at
40˚C)-20 to+70* Input PWM frequency: 25 kHz. speed is 0 min at 0% PWM duty cycle.
-1（inch H2O） （Pa）

Static pressure

2.0

1.5

2.5

PWM duty
100%

600

500

2.0

400

300
50%

1.0

1.5

0

PWM duty
100%

500

400

300
50%

200
20%

100

0

0.2
0

0.5

0.4
10

0.6
20
Airflow

0.8
30

1.2（m3/min）

1.0
40

（CFM）

Fig. 3 Example of airflow vs. static pressure
characteristics of the new model (H speed)

15

600

1.0

200
0.5

12/24 VDC

700

Static pressure

2.5（inch H2O） （Pa）

12/24 VDC

700

SANYO DENKI Technical Report No.48 November 2019

0

100

20%

0

0.2
0

0.4
10

0.6
20
Airflow

0.8
30

1.0

1.2 （m3/min）
40

（CFM）

Fig. 4 Example of airflow vs. static pressure
characteristics of the new model (M speed)Splash Proof Blower San Ace 97W 9W1B Type

4. Key Points of Development
The new model is waterproof and supports high staticpressure. Below is a brief introduction of design points.

4.3 Impeller design
During operation, we assumed that water splashingon the impeller would cause overload, so there was aneed to improve impeller strength. Based on previously
accumulated reliability data, we used pressure simulation

4.1 Waterproof design

technology and increased the number and thickness of the

As Figure 5 shows, to prevent breakdown due to water

impeller blades. We also used fluid simulation technology as

penetration, live parts (motor, control circuit) are coatedshown in Figure 7 to optimize blade length and angle, andwith resin to achieve IP68-rated dustproof and waterproof

reach target performance.

performance. Also, the following techniques were adopted
so the product can be used for prolonged periods inenvironments exposed to water.
(1) Magnet with excellent waterproof performance used
(2) Coated aluminum die cast frameFig. 7 Visualization of air flow
Fig. 5 Appearance of the live parts of the new model

4.4 Circuit design
In addition to the configuration-based protection

4.2 Frame design
The blower is made of a case consisting of a frame andcover that encloses the impeller. It was assumed that

described in 4.2 and 4.3, this product is equipped with adual protection function that suppresses motor drive current
when overload is detected in the circuit.

water would accumulate inside the case depending on
the mounting direction of the blower and the necessary
characteristics could not be achieved. For this reason, we
added water drain holes to drain water from inside the caseas shown in Figure 6. By taking an innovative approach tothe hole shape and position, we successfully achieved bothreliability and high static pressure.

5. Comparison with Splash Proof Axial
Flow Fan
5.1 Comparison of airflow
vs. static pressure characteristics
Figure 8 is a comparison of the airflow vs. static pressure
characteristics for the new model 9W1BM24P2H001, anda conventional similar size model, 92 × 92 × 38 mm Splash
Proof axial flow fan 9WV0924P1H001 (hereinafter “current
model”). Compared to axial flow fans, blowers have higher
static pressure, and the maximum static pressure of the newmodel is 40% higher than the current model. As such, thismodel can support equipment with high impedance.

Fig. 6 Appearance of the live parts of the case

SANYO DENKI Technical Report No.48 November 2019

16

600

Also, as shown in Figure 10, SPL is reduced by 13 dB(A).
As described above, compared to the axial f low fan,
Maximum static pressure
increased by 40%

500

the blower has lower power consumption and SPL in an

400

Current model
9WV0924P1H001

SPL at the operating point(current model): 70 dB(A)300

70Reduced by
13 dB(A)

200

40

600
2

3

4

5

6

Airflow［m3/min］

Fig. 8 Comparison of airflow vs. static pressure
characteristics

5.2 Comparison at estimated operating
point

Estimated system impedance

Figure 9, we compared the new and current models at theoperating point where an equivalent cooling performancecan be obtained. Power consumption is reduced by 74%.

20Power consumption at the operating
point (new model): 11.0 W

100

Static pressure［Pa］

700

Estimated
operating point

New model
Current model

300
200

0
0

1

2

3

4

5

6

Airflow［m3/min］

Fig. 10 Comparison of SPL at operating point

This article has introduced some of the features andperformance of the 97 × 33 mm Splash Proof Blower San
Ace 97W 9W1B type.
It is SANYO DENKI’s first blower with high staticpressure performance with an IP68 rating. As such, the newmodel is expected to perform well in equipment with highsystem impedance used in environments exposed to waterand dust.
By stay i ng a head of the d iversi f y i ng ma rket a nd

400
300

New model

developing products that meet new demands, we will

Current model

continue to offer products which contribute to the creationof new value for our customers to help make their dreams

200

come true.

100
0Power［W］

30

500

400

50

Reduced by 74%

Estimated system impedance

Estimated
operating point

6. Conclusion

60

40

600

500

100

In devices with the estimated system impedance stated inPower consumption at the operating
point (current model): 42.5 W

Static pressure［Pa］

1

50

700

0
0

60

SPL at the operating point(new model): 57 dB(A)New model
9W1BM24P2H001

100

0

1

2

3

4

5

6

Airflow［m3/min］

Fig. 9 Comparison of power consumption
at operating point

1780
SPL［dB（A）］

Static pressure［Pa］

operating range with high system impedance.

SANYO DENKI Technical Report No.48 November 2019

Splash Proof Blower San Ace 97W 9W1B Type

Authors

Koji Ono
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Toshiya Nishizawa
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Kakuhiko Hata
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Takahisa Toda
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Masaki Kodama
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

Hiromitsu Kuribayashi
Cooling Systems Div., Design Dept.
Works on the development and design of cooling fans.

SANYO DENKI Technical Report No.48 November 201918

Feature: SANYO DENKI’s Specialty Technologies

Specialty Technologies in SANUPSPower Systems Products
Takeshi Hama

1. Introduction
Stable electric power supply is essential for comfortable
use of networked electronic devices such as the smartphones
and tablets upon which modern-day society depends.

2.1 Achieving higher efficiency
in the converter, inverter,and control power unit
2.1.1 Use of low-loss circuits
We use low-loss circuits in circuits with switching

Our SA NUPS Power Systems products, including
uninterruptible power supplies (UPS) and renewable energy
inverters, not only provide customers with the high basic

elements, such as the UPS’s converter, inverter, and control
power unit.
Below are examples of these circuit systems.

performance and functionality required in normal situations,but also supply high-quality and stable power to customers’
equipment in the event of unexpected power outages caused
by natural disasters such as heavy rain and earthquakes.

(1) Soft-switching system (resonance type)
Using LC resonance enables zero-voltage and zerocurrent switching that reduces switching loss.

They can also be used for emergency management and BCP(business continuity planning) purposes.

(2) 3-level inverter system

This article will introduce our specialty technologies

Compared with typical 2-level inverter systems, 3-levelsupporting the high functionality, performance, and quality

inverter systems have a greater steady-state loss, but haveof SANUPS Power Systems products.

a 1/2 switching loss, which is significantly lower.

2. High Efficiency Technology

is small, leading to a smaller iron loss of the reactor

Moreover, the switching ripple current amplitude
comprising the AC filter and a reduced overall loss.

High efficiency is required of UPSs and renewable energy
inverters. Therefore, in addition to using high-efficiency(3) 2-phase modulation

circuit systems such as a resonance circuit, 2-phase

This method reduces the switching loss in the 3-phasemodulation system, and 3-level inverter system, we design

output inverter; two of the three phases perform switchingproducts using next-generation semiconductors and low-loss

w ith the remai n i ng phase stopped, thus reduci ng

components. In addition, we optimize the circuit in our own

switching loss by one-third.

unique way.
In this article, we will introduce our technologies used
for achieving higher efficiency using basic UPS circuit
configurations, as shown in Figure 1, as an example.

2.1.2 Circuit optimization
In addition to using the aforementioned circuit systems,
we ach ieve the g reatest ef f iciency i mprovement by
optimizing peripheral circuit configurations including gate

AC
input

Converter

InverterAC filter

drive circuit and gate power supply circuit, the number ofLoadused components, circuit voltage, and switching frequency.
Moreover, in the SANUPS E11A shown in Figure 2,
by creatively reducing the number of switching elements,
we successfully omitted their peripheral circuits such as aBatteries

Control power unit

drive circuit and isolated power circuit required to activate
switching elements.
This improved efficiency by the amount of the reduced

Fig. 1 Example of basic UPS circuit configuration

19

SANYO DENKI Technical Report No.48 November 2019

circuit loss.

Specialty Technologies in SANUPS Power Systems Products

On such occasions, we prototype several dozen reactors
using various windings and cores, and compare them in use
to select the one with the highest efficiency.

2.3. MiscellaneousHigh efficiency can be achieved not only by using theabove-mentioned circuit systems and high-efficiency

Fig. 2 SANUPS E11B

devices, but also by improving the system efficiency.
For example, our power conditioner (renewable energy
inverter) for wind power and hydro power generation

2.1.3 Use of a next-generation semiconductor

systems, SANUPS W73A, has a function to enable the

In recent years, wide-bandgap semiconductors such as SiC

DC input voltage vs. DC input power characteristics to be(Silicon Carbide) and GaN (Gallium Nitride) are attracting

freely set to suit the output characteristics of the wind/hydroattention as next-generation semiconductors. We use SiC

power generator that the power conditioner is connected to,

devices which can be expected to provide high-pressure

thereby increasing efficiency of the overall system.

resistance and low loss.
For example, the SANUPS A22A shown in Figure 3 uses a
3-level inverter system with a circuit configuration effective

3. Uninterrupted Output Technology

for improving efficiency. In addition, an efficiency of 94.5%

In recent years, a wider range of increasingly complex

was achieved by using SiC devices in peripheral circuits,

and advanced production systems can be affected bywhich is considerably high for a double conversion online

instantaneous voltage dips; today’s UPSs not only require

UPS.

high efficiency, but also must provide uninterrupted
transfer. We offer UPSs which provide zero transfer time,such as the SANUPS E23A and SANUPS E33A shown in
Figure 4.

Fig. 3 SANUPS A22A

2.2 Higher efficiency in the AC filter
This section will explain how we achieved higher efficiency
in the AC filter.

Fig. 4 SANUPS E23A / SANUPS E33A
The SANUPS E23A and SANUPS E33A use a parallel
processing topology which normally feeds grid power to theload while a bi-directional inverter connected in parallel

We select the windings used in the reactor of the AC filter

cancels out the harmonic current generated from loadconsidering the skin effect due to harmonic current. Also,

equipment to make the input current sinusoidal and improve

we use a core made of low-loss magnetic materials.

UPS input power factor.

Furthermore, early in the design phase, we perform

Moreover, with this circuit system and our unique transfer

calculations using specification ratings and perform circuit

technology, these UPSs can supply uninterrupted pure sine

simulation to determine which components to use. However,waves even during power outages, instantaneous voltage

sometimes we cannot obtain the expected efficiency on thedips, and momentary outages.

actual circuit due to unforeseen factors.

Figure 5 illustrates the parallel processing topology.

SANYO DENKI Technical Report No.48 November 201920

UPS No.1

Specialty Technologies in SANUPS Power Systems Products

UPS No.2

Equipment and devices

AC input

AC output

Switch- Power equipment, etc.

independently suppressing cross current.
Figure 7 illustrates the fully autonomous control method.

Bidirectional
inverterDC ⇒ AC
Normally
At power
outageBattery

We successfully improved the reliabilityof centerthe system- Datadevice- Factory equipment
UPS
No.3
by achieving parallel operation with each U PS unit

Grid power

UPS No.1
Control
unit

Fig. 5 Parallel processing topology

UPS No.2
Controlunit

4. Technology for Improving Power
Supply Reliability

UPS No.3
Control
unit

Reliability is an important feature of a U PS. Our
UPSs including SANUPS A11M and SANUPS A 22A
achieve improved reliability by using a parallel redundantFig. 7 Fully autonomous control method

configuration and our unique technology.

4.1 Use of a parallel redundant operation
systemEquipment and devices- Data center device- Factory equipment- Power equipment, etc.

5. Conclusion

These ensure a highly reliable power supply by using aThis article has introduced our technologies to achieveparallel redundant operation system that can continue tohigher efficiency, uninterrupted output, and improved

supply power even if one of a number of parallel-connected

reliability that support the high functionality, performance,

identical UPS units happens to fail.

and quality of SANUPS Power Systems products.

Figure 6 illustrates the parallel redundant operation
system.

Moving forward, SANYO DENKI will stay committed
to technological development so we can offer our customers
UPSs and renewable energy inverters that can supply safe,
stable power.

UPS
Load
Grid power

UPS

AuthorTakeshi Hama
Fig. 6 Parallel redundant operation system diagram

4.2 Use of a fully autonomous control
methodIn general, with parallel UPS units that output AC power,
it is necessary to synchronize the voltage amplitude, phase,and frequency to prevent potentially excessive high currents(known as “cross currents”) from damaging the UPS.
However, if a central control unit is used to prevent
this cross current, the failure of this unit may lead to the
shutdown of the entire UPS system. Even with highly reliable
UPS units, if the reliability of the central control unit waslow, the reliability of the whole system would be low.
Therefore, we used a fully autonomous control methodwith a control unit on each UPS unit instead of a central
control unit for parallel operation.

21

SANYO DENKI Technical Report No.48 November 2019

Power Systems Div., Design Dept.
Works on the development and design of power conditioners
and UPS.

New Product Introduction

Development of the Small-Capacity
UPS SANUPS A11M Series
Hiroyuki Hanaoka

Hiroshi Sakaba

Akihiro Tsukada

Yuhei Shoyama

Takuya Ozawa

Hiroyuki Saito

1. Introduction

Kazuya Nishizawa

product”), inherits the concept of supporting easy highreliability and scalable capacity through parallel operation

In addition to the advancement of ICT technology inof multiple 1 kVA units, while increasing the number ofrecent years, the evolution of electronic equipment such

units connectable in parallel from 5 to 8. Also, with SANYO

as smartphones and tablets, which are high-performance

DENKI’s original parallel operation control technology,

information devices, has made global network systems

stable operation, including backup operation in the event ofessential in our daily lives for over a decade now. Sucha power outage, is possible even if communication lines are

systems cannot afford even a split second of downtime,cut. Moreover, with a wider operating temperature range

therefore uninterruptible power supplies (UPS) are used.

and input voltage/frequency range than the current product,

When an abnormality such as a power outage occurs in

the new product can minimize battery wear and enable

the AC voltage supply, a UPS supplies power withoutstable operation by reducing the frequency of switchinginterruptions to electronic equipment by converting theto battery operation, even in regions with unstable powerbuilt-in battery power to AC power. As such, UPSs must be

sources.

highly reliable.
SANUPS A11M, the newly developed small-capacity
UPS series, is optimal for such applications requiring highreliability. This article will provide an overview of thisproduct.

3. Features
As mentioned above, the new product can connect amaximum of 8 units in parallel while the current productcan connect up to 5 units. Figure 1 shows the appearance of

2. Development Backgroundthe new product with 8 units mounted on a rack.

From the late half of the 1990s, computers have beengetting smaller, and requiring lower power consumption.
Moreover, to minimize the risk of data loss the mainstream
method was to connect a UPS to each piece of equipment.
At that time, all high-reliability UPSs had high capacitiesof 100 kVA or higher and used either the working/spare
switching system or the parallel redundant system. There
were no high-reliability UPS in the small-capacity 1 kVAclass.
In 2003, we developed the SANUPS ASE-H enabling theconfiguration of high-reliability redundant systems for thesmall-capacity UPS market. The SANUPS ASE-H has beenused in situations requiring higher reliability for 10 kVA orless, such as backup operation of railway and expressway
management systems.

Fig. 1 SANUPS A11M (8 kVA rack mount type)

As the successor of the SANUPS ASE-H (hereinafter“current product”), the SANUPS A11M (hereinafter “newSANYO DENKI Technical Report No.48 November 201922

3.1 High reliability with autonomous methodof parallel control

can be maintained not only during AC operation, but also

As the inverter output is AC voltage, when connecting

When 8 units are run in parallel as shown in Figure 2,

inverter units in parallel, the voltage amplitude, frequency,

for example, they can handle a load of up to 8 kVA. For aphase, etc. of all units must be exactly the same or anload capacity of 7 kVA or less, having one unit worth orelectrical current called a “cross-current” occurs between

excess capacity means there will be redundancy to maintain

units, and it is no longer possible to maintain current

operation even if one unit fails. In this way, the new productbalance.

achieves highly reliable redundancy through parallel

Examples of control methods of connecting inverters induring backup operation.

operation control with a minimum of common parts.

parallel include the central control method and the master/slave method. These methods have many parts in common,

3.2 Wider input voltage range

such as control circuits and control/communication lines, so

Some reg ion s of t he world have u nderdeveloped

they are suitable for capacity expansion. However, they are

i n f ra st r uc t u re a nd u n st able power system s. Usi ng

not considered highly reliable.

conventional UPSs in such regions may lead to accelerated

In contrast, the new product does not have a central
control unit, but rather features independent control circuits
for each unit. This enables parallel operation of the inverters
through individual control.

battery wear from frequent battery operation caused byvoltage and frequency fluctuations.
We solved this issue by designing the new product to havewide input voltage and frequency ranges; the voltage range

This control method detects input and output voltages,

is 55 to 150 V for the 100 V model and 110 to 300 V for thethen calculates the momentary frequency and momentary

200 V model, and the frequency range is 40 to 120 Hz. This

phase and make adjustments.

can reduce the number of transfers to battery operation

The new product has communication lines between units

even in regions where grid power is unstable and voltage andfor starting/stopping them and sharing measurement data.

frequency fluctuate greatly. This means that stable power

However, synchronization between units is performed at

can be supplied to a load while battery wear is kept minimal.

each unit without relying on inter-unit communication, so
even if inter-unit communication is cut, parallel operation

3.3 Wider operating temperature range
Conventionally, UPSs were primarily used for backup of
ICT equipment and servers, and often used in temperature-

Unit No. 1

controlled environments. In contrast, recently an increasing
number of UPSs are used in environments with little

Unit No. 2

temperature control, such as factories, offices, and stores.
Against this backdrop, we developed the new product toUnit No. 3

8 kVA

have an operating temperature range of -10 to 55˚C. Battery
charging stops at 40˚C or above, however, the new product

Failurecan be used at a higher ambient temperature than thecurrent product as long as the battery lasts.

Unit No. 8

Power supply
can be maintained
if the load is 7 kVAor less

3.4 Support of high load power factors
Current electronic devices can provide power factor
correction and have a high input power factor. Considering
this, we designed the new product to have an increased rated
output power factor of 0.8, while that of the current product

Maintenancebypassis 0.7.

Load

Power distribution unit

Fig. 2 Parallel redundant operation

23

SANYO DENKI Technical Report No.48 November 2019

This led to the new product’s increased active power of
4.0 kW, while that of the current product is 3.5 kW, whencompared in a 5-unit parallel operation.

Development of the Small-Capacity UPS SANUPS A11M Series

3.5 Battery management function
The new product has a function to automatically perform
regular battery tests to ensure batteries are problem-free.

3.9 High performance interface
The new product comes with the following interfaces:(a) Dry contact interface

Furthermore, the new product ensures increased reliability

Just as for the current product, combining with anby offering battery management functions the current

optional Dry Contact Interface Card will enable dry

product does not. Such functions include a battery service

contact output. Moreover, mounting compatibility islife warning, total battery run time, battery state of charge,

maintained, and the new product can replace the current

and estimated backup time.

product in customers’ systems.
(b) Remote switch connector

3.6 Easy maintainability and serviceability
As Figure 3 shows, in the new product, batteries are built
into a plastic tray for easy removal. This makes battery

In addition to having a contact input with an on/off
function just as the current product, the new product canalso use the functions shown in Table 1 with settings.

replacement easy.

Table 1 Remote switch functions
Setting value

Function

ON/OFF
Both are used

ON/OFF is operated using therespective switches. When both ON
and OFF signals are input, OFF isgiven priority.

ON only(Positive logic)(OFF is disabled)

Turn ON/OFF with an ON-side
switch. When the ON signal is input,
the UPS starts up.

OFF only(Negative logic)(OFF is disabled)

Turn ON/OFF only with the ON-side
switch. When the ON signal is input,
the UPS shuts down.

Fig. 3 Front panel and battery

3.7 Reduced size and weightWith a volume of 15.19 liters, the new product is around
1% smaller than the current product, which has a volume(c) EPO (Emergency Power Off) connector
Connecting a switch to this connector and turning it
on will enable the emergency stop of the UPS.

of 15.34 liters. Moreover, by using high-capacity batteries,
the number of batteries used has been reduced from 3 to
2. Also, by simplifying the internal structure, a significant
weight reduction (from 19 kg to 15 kg) has been achieved.

3.8 Network functions
For si mple U P S ma nagement , U P S ma nagement
software SANUPS SOFTWARE STANDALONE can be
downloaded free of charge. A serial cable for computerconnection comes included as a standard accessory.
Connection is also possible via a commercially-available
USB cable. (USB and serial communications are mutually
exclusive)
Moreover, we have an optional LAN Interface Cardand SANUPS SOFTWARE available for advanced UPS
management in a network. These can help users build aflexible, integrated network environment.

SANYO DENKI Technical Report No.48 November 201924

4. Circuit Configuration

circuit and other peripheral circuits.
We have improved the efficiency of the battery charger by
supplying the input power directly.

Figure 4 shows the circuit configuration and system
diagram for the new product UPS unit.

4.2 Control circuit
4.1 Main circuit configuration

Through digitization of the control circuit, the new

The new product UPS unit is composed of a high input

product achieves input and output waveform rectification,

power factor converter, inverter, charger, battery boost

UPS operation sequence, and parallel operation control withcircuit, output transfer switch, bypass circuit, filter, anda single CPU. Moreover, it has CAN for communicating

control circuit.

information from each UPS unit. This makes high-speed
data transfer possible, and unit-specific information such as

With a power distribution unit, up to 8 UPS units can bemeasurement results and failure information can be shared.

connected in parallel.

The number of connected units are managed automatically,

For the high input power factor converter, we adopted a

and an alarm sounds when any of the UPS units stop.

single-switch boost chopper. This chopper is composed of abi-directional semiconductor switch and boosts AC voltage

4.3 Electrical characteristics

into DC voltage. At the same time, there is a function to
condition input current waveform into a sine wave.

Table 2 provides the standard specifications of the new

The inverter is of the half-bridge type and has a reduced

product (per UPS unit).

number of elements, enabling us to eliminate the drive

Bypass circuit

FilterFilter

MAIN MCCB

Fuse

Fuse

Charger

RectifierInverterBoostcircuitControl circuit
Fuse

Battery
External interface
External battery connector

UPS unit 1

Interface
Remote ON/OFF,EPO
USB interface
PC interface
Card interface(optional)

UPS unit 2

UPS unit 8

AC inputSingle-phase2-wire 100/200 V
100 V model(55-150 V)
200 V model(110-300 V)

Filter

Maintenance bypass circuit
MAINTENANCE BYPASS MCCBPower distribution unit

Fig. 4 System diagram

25

SANYO DENKI Technical Report No.48 November 2019

AC output
Single-phase2-wire 100/200 V
100 V model(100/110/115/120 V)
200 V model(200/208/220/230/240 V)）

Development of the Small-Capacity UPS SANUPS A11M Series

Table 2 Specifications
Items
Output capacity

SystemAC input

AC output

Specifications
1 kVA / 0.8 kW

Topology

Double conversion online

RectifierHigh input power factor converter

Cooling method

Forced air cooling

Inverter

High-frequency PWM

No. of phases/wires

Single-phase 2-wire

Input voltage range

55 to 150 V (100 V model)
110 to 300 V (200 V model)

Input frequency range

40 to 120 Hz

Required capacity

1.1 kVAPower factor

0.95 or greater (at rated output)

No. of phases/wires

Single-phase 2-wire

Rated voltage

100/110/115/120 V (100 V model)
200/208/220/230/240 V (200 V model)

Voltage regulation

Within ±5% of rated voltage

Rated frequency

50/60 Hz

Frequency regulation±1, 3, 5% of rated frequency (Factory setting: ±3%)

Voltage harmonic distortion

3% or less (With a linear load)
8% or less (With a rectifier load)Rated load power factor

0.8 (lagging)Transient voltage fluctuation

Within ±10% (For abrupt load change)
Within ±10% (Loss or return of input power)
Within ±10% (For abrupt input change)

Overcurrent protection

Uninterrupted transfer to bypass

Overload capability

105% (Inverter)

Battery type

Small-sized valve-regulated lead-acid (VRLA) battery

Backup time

5 min (When the power factor is 0.7)

Acoustic noise (at 1 m from the front of unit) 45 dB or less
Operating environment

Ambient temperature: -10 to 50˚C
Relative humidity: 10 to 90% (non-condensing)

5. Conclusion
This article has introduced the SANUPS A11M UPS
capable of parallel operation of up to 8 kVA by combining
1 kVA UPS units (a maximum of 7 kVA in redundancy).
This product supports high-reliability and scalable capacity,
adopts SANYO DENKI’s original parallel operation
control technology, and features an expanded operating
temperature range and input voltage/frequency range.
Worldwide, there are not many UPSs in the small-capacity
few kVA class capable of performing parallel redundant
operation. As such, we are confident this product cancontribute to customers requiring small capacity and highreliability.

SANYO DENKI Technical Report No.48 November 201926

Development of the Small-Capacity UPS SANUPS A11M Series

Authors

Hiroyuki Hanaoka
Power Systems Div., Design Dept.
Works on the development and design of UPS.

Hiroshi Sakaba
Power Systems Div., Design Dept.
Works on the development and design of UPS.

Akihiro Tsukada
Power Systems Div., Design Dept.
Works on the development and design of UPS.

Kazuya Nishizawa
Power Systems Div., Design Dept.
Works on the development and design of UPS.

Yuhei Shoyama
Power Systems Div., Design Dept.
Works on the development and design of UPS.

Takuya Ozawa
Power Systems Div., Design Dept.
Works on the development and design of UPS.

Hiroyuki Saito
Power Systems Div., Design Dept.
Works on the mechanism and design of UPS.

27

SANYO DENKI Technical Report No.48 November 2019

New Product Introduction

Development of the SANUPS W73A
Grid-Connected Isolated Type
Makoto Ishida

Hirofumi Nishizawa

Tetsuya Fujimaki

1. Introduction

Katsutoshi Tanahashi

outages due to natural disasters have occurred across Japanin recent years, and in each case it took several days to

An outcome of the 21st yearly session of the Conference

restore power. As such, there is an increasing number ofo f t h e P a r t i e s “ Un i t e d N a t i o n s C l i m a t e C h a n g ecustomers considering the installation of power conditioners

Conference” (COP21) held in late 2015, was the adoption ofwith an isolated operation function to secure a power supply

the Paris Agreement, whereby member states declared theirfor emergency situations.

commitment to suppressing temperature increase to less

There is also a demand for independent power supplies

than 2˚C above pre-industrial levels and ongoing efforts toin non-electrified areas such as remote islands. As such,

limit the temperature increase to 1.5˚C.

we developed the SANUPS W73A grid-connected isolated

In Japan, the Strategic Energy Plan was revised in 2018
and the 5th Strategic Energy Plan was established.(1) Thistype, by adding an isolated operation capability to theexisting SANUPS W73A grid-connected type.

plan aims to make renewable energy “an economically selfsupporting, decarbonized main source of electricity” by2050. Moving forward, it is expected that introduction ofrenewable energy will be promoted further.
Against such a backdrop, wind power and hydroelectric
power generation are expected to grow more than others;

3. Specifications of the SANUPS W73A
Figure 1 shows the appearance of the SANUPS W73A,
Figure 2 shows its basic circuit configuration, and Table 1
provides its main specifications.

wind power generation is more popular than photovoltaic

We designed the new SANUPS W73A grid-connected

power generation in terms of the capacity that has been

isolated type to feature an isolated operation capability by

applied for connection request to power companies,

adding parts to, changing the parts layout of, and changing

and hydroelectric power generation has a relatively highthe control program of the existing SANUPS W73A grid-purchase price in the renewable energy feed-in tariff (FIT).

connected type without changing the dimensions.

As such, we have newly developed the SANUPS W73A
grid-connected isolated type as a power conditioner forwind power and hydro power generation systems that can beused as an emergency power supply. This article will provide
an overview of the new model and its features.

2. Development BackgroundIn 2017, we released the SANUPS W73A, a 9.9 kW gridconnected type power conditioner (renewable energy
inverter) for wind power and hydro power generation
systems.
However, grid-connected type power conditioners cannot
provide power in the event of a power outage in the grid.
A s repre s ent e d by t he Hok k a ido E a st er n I bu r i

Fig. 1 SANUPS W73A

Earthquake and the 2018 Japan floods, large-scale power

SANYO DENKI Technical Report No.48 November 201928

■ Grid-connected isolated type■ Grid-connected typeDC-AC
inverter
circuitControl circuit /grid protection circuit

Signal
input

MC

MCCB

Gridconnected
outputOperation/
display circuit

DC input

MCCB

Signalinput

Isolated
converter

DC-AC
inverter
circuitControl circuit /grid protection circuit

FilterIsolated
converter

FilterMCCB

FilterDC input

Filter

MC
MC

MCCB

Isolated
outputGridconnected
outputOperation/
display circuit

Fig. 2 Basic circuit configuration
Table 1 Main specifications
Model

Item

Output capacity
Main circuit type
Switching method
Isolation method
Cooling method
Rated voltage
Maximum allowable input
voltage
DC input
Input operating voltage
range
No. of input circuits
No. of phases/wires
Rated voltage
Rated frequency
Rated output current
GridCurrent harmonic distortion
connected
outputOutput power factor
Efficiency

Isolated
output

150 to 570 VDC

Rated output range 250 to 540 VDC

1 circuit
3-phase 3-wire
202 VAC50/60 Hz28.3 AAC
Total current: 5% or less, individual harmonic order: 3%
or less

Percentage of rated output current
At the rated output and a power factor of 1.0
Power factor setting range: 0.8 to 1.0 (inincrements of 0.01)
Efficiency measurement methodin accordance with JIS C 8961
With a power factor setting of 1.0

0.95 or greater
93%
−

−

9.9 kVA
3-phase 3-wire
202 VAC
Within ±8% of rated voltage
50/60 Hz
Within ±0.1 Hz of rated frequency
Linear load: 5% or less
100% continuous

Efficiency

−

93%

−

Automatic or manual(Factory setting: Manual)

−
−
−
−
−
−

Grid protection

Overvoltage (OVR), undervoltage (UVR),
overfrequency (OFR), and underfrequency (UFR)

Passive method
Islandingdetection
Active method
Communication
Acoustic noise

Voltage phase jump detection
Frequency feedback method with step injection
RS-48550 dB or less

Operatingenvironment

Ambient temperature-25 to +60˚C

Relative humidity
Altitude

90% or less (non-condensing)2000 m max.
Munsell 5Y7/1 (semi gloss)
745 W
64 kg

Paint color
Heat dissipation
Mass

Remarks

570 VDC

Rated output
No. of phases/wires
Rated voltage
Voltage regulation
Rated frequency
Frequency regulation
Voltage harmonic distortion
Overload capability

Operation mode (grid-connected operation/
isolated operation) switchover setting

29

Grid-connected Grid-connected isolated type
type
W73A992R
W73A992S
9.9 kW
Self-commutated voltage typeHigh-frequency PWM
High-frequency isolation
Forced air cooling
400 VDCSANYO DENKI Technical Report No.48 November 2019

Efficiency measurement methodin accordance with JIS C 8961
An overvoltage ground relay (OVGR) shallbe externally connected to the factoryconfigured normally-closed dry contact input.

A-weighting, 1 m from front of unit
Operates at derated output above 40°C
during grid-connected operation

Development of the SANUPS W73A Grid-Connected Isolated Type

4. Featuresand isolated operation modes has been simplified and can

4.1 Isolated operation function

on or off, rather than the conventional method of selecting

be done by merely turning the grid output circuit breaker

The SANUPS W73A grid-connected isolated type canperform isolated operation when in isolated operation

operation modes.
T his enables customers to switch over to isolated
operation without having to perform difficult operations.

mode.
Isolated operation is an operation mode used during grid
power outages. Power generated by a wind power generator

4.3 Soft start methodor hydroelectric power generator is rectified to DC power,

When connecting transformers and pumps to the isolated

then converted to AC power with a constant frequency,

output of a power conditioner, the following issues arise.

constant voltage, and sinusoidal waveform, before being

First, to excite the transformer, an excitation inrush current

supplied to emergency equipment.

approximately ten times the regular current flows. Also, a

The new model delivers 9.9 kW, 3-phase 3-wire 202 VAC

large starting current occurs when starting the motor that

output power during isolated operation, supplying power todrives the pump. This might activate the protection function

emergency equipment even in the event of a power outage.

of the power conditioner (overcurrent detection), often

Moreover, it can supply power as an off-grid power supply inleaving the isolated operation not activated.

non-electrified areas such as remote islands.

Against such a load, the transformer’s excitation inrush

Figure 3 illustrates the isolated operation of the SANUPSW73A grid-connected isolated type.

current can be suppressed by starting up the power
conditioner’s isolated output from a low voltage (0 V) andrising gradually to the rated voltage. This type of soft start is

Isolated operation (during power outages)

referred to as a VVCF (variable voltage, constant frequency)
Grid powersoft start.
Furthermore, it is possible to suppress the pump’s starting
current by raising it to the rated value with the ratio ofPoweroutagestart voltage and frequency fixed to a constant. This typeof soft start is known as VVVF (variable voltage, variablefrequency).

Power generation

The SANUPS W73A offers both the VVCF and VVVF
soft start methods, and customers can also choose from thefour startup time options of 2, 5, 10, and 20 seconds. This
allows the power conditioner to perform isolated operation
with the starting current suppressed regardless of the load
connected.

Emergency
equipmentPoweroutage4.4 DC input voltage - DC input power
characteristics settings

図版のFor the SANUPS W73A, customers can freely selectGeneralequipment

Fig. 3 Illustration of isolated operation

123

a minimum of 2 to a maximum of 32 DC input voltage

英語版

Cond

- DC input power characteristics (hereinafter “power

英語版

characteristics”) settings to match the output characteristics

Timeof a specific wind power or hydroelectric power generator.
Moreover, operation-start/stop voltage can be set freely

4.2 Switchover to isolated operation
The SANUPS W73A grid-connected isolated type canbe set to either manually or automatically switch between
operation modes as follows: from grid-connected operation
to isolated operation when an outage occurs in the grid, orfor use with various systems.
This enables efficient use of the power generated by wind
power or hydroelectric power generators.
Figure 4 shows an example of power characteristics
settings.

from isolated operation to grid-connected operation when
grid power is restored after an outage.
Moreover, manual switchover between grid-connected

SANYO DENKI Technical Report No.48 November 201930

between 0.8 and 1.0 during grid-connected operation, which
10000

means increases in grid voltage can be suppressed without

DC input power [W]

the need to install special-purpose equipment or reinforced
8000

wiring.

6000

4.7 Adoption of frequency feedback methodwith step injection of reactive power

4000

The SANUPS W73A uses an active islanding detection
method of a frequency feedback method with step injection

2000

0

of reactive power (hereinafter “new active method”) which
detects the frequency change caused by injecting the
0

100

200

300

400

500

図版の文字

reactive power
123 calculated from the frequency deviation that600

DC input voltage [V]occurs when英語版用
there is a power outage.
CondensFig. 4 Example of power characteristics settings

In principle, the new active method is characterized by
英語版用

not causing Timesinterferencewith other active methods, which isTenuseful when connecting multiple renewable energy inverter

4.5 Voltage rise control standby function

units.

The power conditioner is equipped with a voltage risecontrol function to maintain power grid voltage within
the appropriate range as well as prevent breakdowns andreduced life of electrical products.

4.8 Remote monitoring service
The SANUPS W73A can be combined with our SANUPSPV Monitor for remote monitoring and data collection/

The two types of voltage rise control function are phase-

analysis via a network.

advance reactive power control and output control. If theF u r t her more, by u si ng t he S A N U P S NET st at u s

AC output voltage of the power conditioner exceeds themonitoring service, the SANUPS W73A system status

preset value during the grid-connected operation, phase-

can be monitored via the internet from computers andadvance reactive power control will be activated. If the ACsmartphones.

voltage does not stop rising, the output control will limit

S A N U P S N E T u s e r s c a n s el e c t e it h e r a p owe r

the output power and voltage. As such, if the output control

visualization service or system information managementof the voltage rise control function is activated, the power

service, depending on their needs.

conditioner will generate less power.

The power visualization service displays the power

This marks the first time the voltage rise control standby

generation status and collects data. In addition to powerfunction was featured on a power conditioner for 3-phasev isua l i zation, the system i n for mation ma nagement*

output wind power generation and hydro power generation.

service also provides notifications of operational status,

From the 2016 version of the grid-interconnection

the occurrence of trouble or alarms, and equipment fault

code (JEAC 9701-2016), it became acceptable to have an

recovery. It also provides alarm and fault recovery history

operation time limit in the voltage rise control. As such,for reference.

we set a 200-second operation time limit for the voltage

Fig u re 5 i l lu st rate s a remote mon itor i ng systemrise control to come into action.** With this, grid voltage

c on f ig u ration usi ng the SA N UP S PV Moni tor a ndincreases within 200 seconds will not cause the voltage rise

SANUPS NET.

control function to suppress the power conditioner’s output.
This function can contribute to reducing the power
generation loss from voltage rise control.

4.6 Power factor correction function
As a countermeasure to the problem of increased
electrical current in the power distribution grid due to thelarge-scale introduction of renewable energy, the SANUPSW73A comes with a power factor correction function forgrid-connected operation as standard.
This can correct the output power factor to a value

31

SANYO DENKI Technical Report No.48 November 2019

* Based on our own research as of March 27, 2019, amongp ower conditioners for wind p ower and hydro p ower
generation systems.
** The 200 -second standby time limit was stipulated as thestandard value from the maximum value of an SVR (stepvoltage regulator) with the longest operation time limit among
voltage regulators in power distribution grids. This was theresult of an investigation by the Federation of Electric Power
Companies in Japan in accordance with the view that operation
time limit should be coordinated with voltage regulators in
power distribution as per grid connection regulations.

Development of the SANUPS W73A Grid-Connected Isolated Type

Installation locationsof wind power generation/hydroelectric generation systems

Cloud serverType C

RouterInternet

Serial communications(RS-485)

Mobile communication pack
Power conditioner

Remote monitoring(PC, smartphone)Fig. 5 Example of remote monitoring system configuration

4.9 Dustproof/waterproof performance

Reference

The SANUPS W73A has a protection rating of IP65 and(1) “The 5th Strategic Energy Plan,” Agency for Natural Resources

a sealed structure with excellent dustproof and waterproof

and Energy, Ministry of Economy, Trade and Industry

performance for outdoor use. This protects the producthttps://www.enecho.meti.go.jp/en/category/others/basic_from the ingress of rain, dust, and small insects, and makes

plan/5th/pdf/strategic_energy_plan.pdf (2019.9.17)

for a highly-reliable product that can be used with greater
peace of mind.
Authors

4.10 Salt damage countermeasure
Assuming use in environments susceptible to salt damage,
we verified that the SANUPS W73A would not have its
functionality and performance impacted by performing

Makoto Ishida
Power Systems Div., Design Dept.
Works on the development and design of PV power systems.

a salt spray test (Severity 6 test in accordance with theIEC 60068-2-52 salt spray test method). As such, we have

Hirofumi Nishizawa

designed the product to be salt resistant so it can be installed

Power Systems Div., Design Dept.
Works on the development and design of PV power systems.

in locations 500 meters or more away from a coastline.

図版の文字

123

5. Conclusion

英語版用Tetsuya Fujimaki

Condens

Power Systems Div., Design Dept.
Works on the development and design of PV power systems.
Times Ten
英語版用This article has provided an overview of the SANUPSW73A grid-connected isolated type power conditioner
for wind power and hydro power generation systems, andKatsutoshi Tanahashi

introduced its features.

Power Systems Div., Design Dept.
Works on the mechanical design of PV power systems.

The new model can meet the needs of customers who wish
to use electrical power even in environments with no grid
power or to secure power supply in times of emergency.
Moving forward, in addition to the development of newtechnologies such as smart grids for solving problems arisingfrom the mass introduction of renewable energy, SANYODENKI will swiftly develop products that use these newtechnologies and offer products that use all forms ofrenewable energy to contribute to a low-carbon society.

SANYO DENKI Technical Report No.48 November 201932

Feature: SANYO DENKI’s Specialty Technologies

Specialty Technologies for Efficiently
Producing Servo System Products
Shusaku Magotake

Kazuhiro Makiuchi

1. Introduction

which are often processed manually to maintain flexible
production. In the building of our Innovation Lines, we

The aim of manufacturing (“monozukuri” in Japanese)

utilized automation technologies such as robotics andis to create products with value through processing andsensing technologies to efficiently produce a wide variety ofassembling materials and parts based on the design

products with uniform high quality.

information. This value is the value for our customers who

This section will introduce the specialty technologies

use our products. Creating this value swiftly and simply is

and ingenuities incorporated in the servo motor Innovation

not only the essence of monozukuri but also our mission.

Line.

Since our founding, SANYO DENKI has been devisingvarious ways to create technologies and equipment to deliver
value in the form of products to our customers. Through this

2.1 Specialty technologies
in the winding processprocess, we have developed many “specialty technologies.”

In the winding process, copper wire is changed for

In April 2016, we began a five-year mid-term management

each motor model to suit its characteristics. During setup

pla n wh ich conta i ned mu ltiple i n itiatives a i med atchanges, the necessary equipment adjustments impede“manufacturing innovation.” The goal of the plan is to

production efficiency.

double productivity, cut production lead-time to one-On this Innovation Line, we developed a method toquarter, and halve in-process inventory by building

automatically remove insulation coatings from the copper

innovative manufacturing lines in pursuit of efficient
production.
Using our so-called “Innovation Lines” as examples,
this article will introduce the “specialty technologies andingenuities” we leverage to produce Servo Systems products
efficiently. First, we will look at the production process for
servo motors, then that of servo amplifiers.

2. Specialty Technologies
on the Servo Motor Innovation Line
Many customers use SANYO DENKI’s customized
products. As such, we have a wide variety of products

Fig. 1 Laser coating removal system

Table 1 Comparison of conventional technique and innovative technique (winding process)
Items

33

Conventional techniqueInnovative technique

Removal method

Mechanical cutter

Laser irradiation

Jig change/adjustment

Cutter blade positioning adjustment
Check using sample workpieces

None

Removal check

VisualImage-based judgment

SANYO DENKI Technical Report No.48 November 2019

Specialty Technologies for Efficiently Producing Servo Systems Products

wiring using lasers. By focusing on improving productionof the applied bonding agent using a non-contact sensor

efficiency, we eliminated the need for equipment adjustment

to verify its condition. Similarly, Figure 3 shows the unit

during changeovers. Figure 1 shows the laser coatingfor 40 × 40 to 80 × 80 mm motors using an image sensor to

removal system. Table 1 shows a comparison of theverify the uniformity of the application. These specialty

conventional technique and innovative technique.

technologies realize an automatic line with uniform bonding

Previously, a mechanical cutter would remove winding

quality. Since its installation, the new line has increased

coatings. The cutter blades had to be replaced to matchproductivity six-fold, cut production lead time to a quarter,

the wire diameter, which was time-consuming. We utilized

and eliminated in-process inventory.

an innovative technique that removes coating via laser,
enabling more seamless production just by switching
programs when changing copper wires. Moreover, byusing image technology, the quality of coating removal is
automatically inspected.
By automating the coating removal process for windings,
we reduced the time required to change and adjust jigs.
A motor production line applying this technology has 2.3
times higher productivity and one-quarter production leadtime compared to conventional lines, as well as zero inprocess inventory.

2.2 Specialty technologies
in the magnet bonding process

Fig. 2 Magnet bonding unit
for 20 × 20 mm AC servo motors

Assuring adhesion quality in the magnet bonding process
is vital. Without sufficient bonding, the rotor would spin
freely and fail to convey mechanical energy to equipment.
To minimize such occurrence, we integrated automatedbonding robots into the Innovation Line. These precision
robots delicately apply an even coat of bonding agent thenautomatically inspect the magnets for any minute fissuresand flaws to ensure that parts leave the process defect-free.
Figure 2 shows a magnet bonding unit for a 20 × 20 mm
AC servo motors, while Figure 3 shows a similar unit for
40 × 40 to 80 × 80 mm motors. Table 2 is an overview of thesystems that these bonding units use to check the bonding
condition.
Failure modes of bonding agent application include when

Fig. 3 Magnet bonding unit
for 40 × 40 to 80 × 80 mm AC servo motors

bubbles in the bonding agent tank prevent the agent fromdischarging, and when the discharged agent does not adhere
to the magnet. We have built a system that utilizes sensing
technology to detect these failure modes and introduced it
to the Innovation Line.
As shown in Figure 2, the bonding agent application unit
for 20 × 20 mm AC servo motors measures the thickness

Table 2 Overview of the bonding application check systems
Flange size 20 × 20 mm line

Items

Flange size 40 × 40 to 80 × 80 mm line

Inspection sensor

Laser

Camera + Image processing

Detection method

Measure the thickness of the applied bonding
agent

Verify whether or not the bonding agent isapplied uniformly

SANYO DENKI Technical Report No.48 November 201934

2.3 Specialty technologies
in the part machining process

2.4 Specialty technologies
in motor inspection

This section will introduce an example of the partFor motor inspection, we built an automatic inspection

machine process: machining the sheet metal plates used forline that can “swiftly and simply” inspect a wide variety oflinear servo motors.

products.

As Figure 4 shows, this process consists of an automaticline combining an articulated robot and machine tool.

Figure 5 shows a section of this automatic inspection
line. Table 4 compares the new line with a conventional

Table 3 is a comparison of the conventional line andinspection line.

the Innovation Line. Conventionally, plates were loaded

Previously, different equipment was required for each

and unloaded in and out of the machine manually. The

inspection criteria, causing in-process inventory to build up

heavy plates put a significant burden on operators, making

before and after each task. Furthermore, motors had to behandling difficult. Metal scraps and chips also had to be

manually attached and removed at each equipment.

removed in the middle of the process.

For the Innovation Line, we developed an inspection unit

On the Innovation Line, however, a robot and machine

integrated with a conveyor. We built a line which connects

tool operate in tandem to automatically load plates, process,to this unit and conveys motors on pallets. Each inspection

remove scraps, and unload plates. When loading a plate tounit scans the 2D code on the motor nameplate, enabling it

the machine tool, we fashioned a way to utilize a sensor to

to automatically load the inspection program with required

detect whether or not the plate is seated properly to prevent

settings, then secure and connect the motor. The result is

machining defects.

zero in-process inventory.

Fig. 5 Automatic inspection line for motors

Fig. 4 Tandem operation of a robot and machine tool
Table 3 Comparison of a conventional line and the Innovation Line (part machining process)
Items

Conventional line

Innovation Line

Conveying method

Operator carries heavy parts

Robot conveyance

Scrap removal

By operator

By robot

Table 4 Comparison of conventional line and Innovation Line (inspection process)
Items

35

Conventional line

Innovation Line

Conveyance and attachment/removal

By operator

Automatic

In-process inventory

Yes

None

Equipment setting/adjustment

By operators

Automatic

SANYO DENKI Technical Report No.48 November 2019

Specialty Technologies for Efficiently Producing Servo Systems Products

3. Specialty Technologies
in the Servo Amplifier Innovation Linearranged haphazardly during setup, robots can pick up theright ones.
The second solution involves using a camera to check the

Of our servo amplifier manufacturing processes, weorientation and position of components in relation to therevamped the processes for electronic component mounting,robot gripper. Figure 7-2 shows an example of the positional

assembly, and inspection. For the Innovation Lines, byrelationship between a component and robot gripper. Thisutilizing robots and sensing technologies, we engineered afunction quantifies the displacement between the gripper

way to automate work once done exclusively by our workers.

and lead component, and the amount of lead bend so thatthe robot can judge whether it is correctly picking up the

3.1 Specialty technologies
in the mounting line

component. Moreover, this function is used to correct
positioning during insertion.

Roughly speaking, we have two PCB related processes:
surface mounting technology (SMT) and through-hole
technology. Our SMT process, where small electronic
components are mounted to PCBs, have already been
automated using chip mounters and other SMT equipment.
However, inserting larger through-hole components withleads (known as lead components) had to be done manually
by our workers.
Operators would intuitively correct positioning while
inserting leads, without paying much attention to the leadcomponent and through-hole positions.
Figure 6 shows the newly built component insertion linewith an array of robots. For this line, we crafted a way tomeasure and reproduce the “unconscious movements” ofour component insertion operators to make our robots morehuman-like.

Fig. 7-1 Component coordinate detection
using pattern matching
Camera image

Model image 2

Fig. 7-2 Positional relationshipbetween components and robot gripper

3.1.2 Lead component insertion
Fig. 6 Component insertion line with robots

As shown in Figure 8, we added a force sensor and an
image sensor to ensure that the robots correctly inserted
components into the correct position.

3.1.1 Lead component picking
We came up with two solutions to ensure that the robots
would accurately pick up the correct components.

First, the image sensor detects the PCB’s through-hole
position. Next, the robot corrects positioning, then inserts
the component. When a lead component contacts the PCB,First, we used pattern matching to search for components.

force is exerted. A force sensor detects this force, allowing

Figure 7-1 shows an example of using pattern matching forthe system to calculate the positional relationship of the leadconnectors. Using pattern data, the robot will identify thenand through-hole.

pick up components to be inserted within the robot camera’s

If a force greater than the set value is detected, the sensor

search area. With this function, even if components arewill determine that the lead position and through-hole

SANYO DENKI Technical Report No.48 November 201936

position are misaligned then direct the robot to perform asearch operation. This search operation involves monitoring
force at the time of insertion with a force sensor, thenmoving the robot arm slightly along a horizontal plane. If
the force detected in the search operation is less than the set
value, the sensor will determine that the lead and throughhole position are aligned, then signal the robot to insert thecomponent.

3.1.3 Post-insertion checks
To check that a component is correctly inserted, we
installed the mechanism shown in Figure 8, which uses a

Fig. 9 Assembly and inspection line

laser displacement sensor.
After the insertion operation, a laser is applied to multiple
points of the lead component’s top face to detect its height.
If the measurement exceeds the set height, it will be judged
as not sitting correctly. This prevents defects caused by acomponent not being fully inserted.

3.2.1 Automation of the assembly process
The assembly process consists of a part supply section
and a product assembly section.
In the part supply section, robots pick and place parts
from the stocker to the assembly station. Here, image

As described above, we combined robotics and sensing

sensors prevent incorrect part supply by confirming that it istechnology to allow robots to perform the same movements

the correct part, and that it is placed in the correct position.

that human workers do unconsciously. Compared to the

In the product assembly section, for each part positioned

conventional process, the new component insertion process

on the assembly station, a robot performs screw tightening,is four times more productive, has one-third the production

grease application, and cover mounting.

lead-time, and produces zero in-process inventory.

Torque screwdrivers ensure that screws receive theappropriate amount of torque. When grease is applied,an image sensor verifies grease application. Moreover,when the cover is mounted, the force sensor detects
the engagement force while the image sensor checks

Force sensor

engagement.
We introduced tool changers, as shown in Figure 10, toenable a robot to perform multiple tasks. A tool for the
specific application is set in the tool changer, and the robot
Image sensor

changes tools automatically for each task. This has made it
possible to assemble efficiently within a limited space.

Laser displacement sensor

Fig. 8 Sensors on a robot arm

3.2 Specialty technologies
in the assembly and inspection line
Following component mounting is servo amplifierassembly, inspection, and packing. Figure 9 shows the newly
built assembly and inspection line.
On this Innovation Line, as with the mounting process,manual work has been replaced by robot work, creating an
automated line capable of efficient product manufacturing.

Fig. 10 Tool changer

37

SANYO DENKI Technical Report No.48 November 2019

Specialty Technologies for Efficiently Producing Servo Systems Products

3.2.2 Automation of the inspection process
In the inspection process, characteristics are inspected toin-process inventory was eliminated on the new assembly
and inspection line compared to the conventional line.

check that servo amplifiers operate correctly.
During characteristics inspection, various cables andconnectors must be connected to the servo amplifiers. Thiswork, previously done by human operators, is now doneby robots. Multiple connectors are used for inspection;
therefore, as shown in Figure 11, an image sensor captures
images of the various connector shapes to differentiatethem.
The image sensor detects the positions of the connectors
on both the receiving and insertion sides. Then robots
insert the connectors while the force sensors ensure that theappropriate force is applied. Because the required insertion

Fig. 12 Automatic packaging line

force differs depending on the connector shape, we set theinsertion force for each connector to enable automation.

4. Conclusion
This article has introduced the specialty technologies andingenuities of the Innovation Lines for our Servo Systems
products. Each process incorporates specialty technologies
and ingenuities unique to SANYO DENKI.
Our uncompromising stance is “efficiently making a wide
variety of products with stable quality.” To achieve this,we engineered various robotics and sensing technology
techniques for our Innovation Lines.
M ov i n g fo r w a r d , S A N YO D E N K I w i l l p u r s u e

Fig. 11 Connector imaging screen

manufacturing innovation to continue providing customers
with products and services that deliver value.

3.2.3 Automation of the packing process
Figure 12 shows a line where completed servo amplifiers
are automatically packaged. Robots complete all the tasks

Authors(i.e. box making, bagging, boxing, and sealing) previously
done by human operators.
When building the packaging line, we focused on packaging
form. The conventional packaging form was designed
around human workers and was not suited to automation.

Shusaku Magotake
Servo Systems Div., Production Engineering Dept.
Works on the production technology of controllers and servo
ampliﬁers.

However, we changed packaging specifications to enablerobots to perform packaging. Changing the product design

Kazuhiro Makiuchi

to suit automatic assembly was one area in particular where

Servo Systems Div., Production Engineering Dept.
Works on the production technology of servo motors.

we took an uncompromising stance.
We optimized everything from robot operations andgripper shape to outer box size, fold shape, and cushioning
material shape in order to make automation possible.
Moreover, by changing the label sticker attached to the
cardboard box to direct inkjet printing, we eliminated the
sticker attachment process.
As a result of the above efforts, productivity increased by
4.7 times, production lead-time was cut to one-quarter, and

SANYO DENKI Technical Report No.48 November 201938

New Product Introduction

SANMOTION K Series DC Servo Motor
Daigo Kuraishi

Hidetoshi Hayashi

Yuji Yamamoto

Toshiya Miyashita

Takeshi Miura

Shogo Yoda

Atsuko Kubo

Chieko Hoyano

Yuki Onda

Kenta Matsushima

Atsushi Takijima

Masaaki Yamaguchi

1. Introduction
With over sixty years of history, SANYO DENKI’s
DC servo motors have contributed to the advancement ofindustry in Japan.(1) Recently, they have even been adopted
in precision measuring equipment such as coordinate
measuring machines and medical equipments. These
applications require low motor speed fluctuation andtemperature rise to improve measurement accuracy. Also,
low voltage and noise are necessary because such machinery
operates near people.
Our new SA NMOTION K series DC servo motors
significantly reduce cogging torque, which causes speed
fluctuation, and have low temperature rise and reduced loss.
Moreover, we have devised the brushes and body structure
to lower noise.

Fig. 1 Appearance(54 × 54 mm 110 W motor with encoder)As with our current model, the lineup includes four flange
sizes (42, 54, 76, and 88 mm). We have added a low-voltage
model to the standard lineup in flange sizes of 42 × 42 and54 × 54 mm.

2.2 Lineup and main specifications
Table 2 shows the standard lineup and options. As withthe current model, incremental encoders, tachogenerators,

This article will introduce the lineup of the new model,

and brakes can be mounted to the new model. Options canas well as its specifications and features. While developing

be combined, so we can flexibly respond to the requirements

this new model we devised manufacturing technologies toof individual customers. The standard lineup models also

ensure stable performance.

conform to the UL, cUL, and IEC safety standards.

2. Specifications

model, while Table 4 lists the main specifications of

2.1 Appearance and dimensions

54 × 54 mm low-voltage motors to the standard lineup, even

Table 3 lists the main specifications of the low-voltage

Figure 1 depicts one example of the new model, amachines operating close to people can be used safely. For

54 × 54 mm 110 W motor with an encoder. Figure 2 andthis reason, the new model can be used for a wider range

Table 1 provide the main dimensions of the new model.

of applications while having optimal specifications for

The new model has the same mounting dimensions as our

precision measurement equipment and medical equipment.

current T series. As such, replacement is possible without
needing to change equipment-side mounting specifications.

39

the standard voltage model. By adding 42 × 42 mm and

SANYO DENKI Technical Report No.48 November 2019

SANMOTION K Series DC Servo Motor

LR

LC

□

LL

LE

øLZ

A

øS

øLB

øL

1000±501000±50

N.P.

Lead wire(Motor)Lead wire(Earth)Lead wire(Encoder)Fig. 2 Main specifications (with encoder)
Table 1 List of main specifications (with encoder)
Dimensions(mm)

KB402XS0

LL

83±1

KB404XS0
KA404XS0
96±1

KB406XS0
KA406XS0
109±2

KB506XS0
KA506XS0
110.5±2

Model
KB511XS0
KA511XS0
130.5±2

KA720XS0

KA730XS0

KA840XS0

KA850XS0

134.5±2158.5±2

166±2

181±2

48±0.2034−0.0252±0.3

60±0.3050−0.025
2.5±0.3

LC

42±0.554±0.576±0.888±0.8LZ

4−ø3.54−ø4.54−ø5.54−ø6.630±0.8014−0.011

35±0.8016−0.011

LA
LB
LE

90±0.3070−0.030
3±0.4

24±0.80
7−0.009LR
S

100±0.3080−0.030

Table 2 List of standard lineup and options
Flange size
(mm)

42

54

76
88

Rated
output(W)

Rated armature voltage
Low voltage(KB)
24 V classStandard voltage(KA)
75 V class

23

◯

−

40

◯

◯

60

◯

◯

60

◯

◯

80

◯

−

110

−

◯

200

−

◯

300

−

◯

400

−

◯

500

−

◯

Rated
speed
(min-1)

Options
Protection
Safetyratingstandards Tachogenerator Brake

3 V/krpm

−

3000
IP43

UL
cUL
IEC
7 V/krpm

Incremental
encoder

90 VDCStandard
2000 P/R(A phase,
B phase,Z phase)2500

SANYO DENKI Technical Report No.48 November 201940

Table 3 List of main specifications (low-voltage model)
Model number

KB402

Rated armature voltage (V)

20 DC

KB404

KB406

KB506

KB511

24 DC

Rated output (W)

23

40

60

60

80

Rated speed (min -1)

3000

3000

3000

3000

3000

Max. speed (min -1)

5000

5000

5000

5000

5000

Rated torque (Nm)

0.074

0.13

0.19

0.19

0.26

Peak torque (Nm)
Rotor inertia(× 10 -4 kg･m 2) (Note)
Motor weight (kg) (Note)

0.42

0.76

1.2

1.8

2.16

0.047

0.084

0.108

0.22

0.37

0.3

0.4

0.5

0.8

0.85

(Note) Value of motor only

Table 4 List of main specifications (standard voltage model)
Model number

KA404

KA406

KA506

KA511

KA720

KA730

KA840

KA850

Rated voltage (V)

72 DC

70 DC

75 DC

75 DC

80 DC

75 DC

85 DC

80 DC

Rated output (W)

40

60

60

110

200

300

400

500

-1

Rated speed (min )

3000

3000

3000

3000

3000

2500

2500

2500

Max. speed (min -1)

5000

5000

5000

5000

5000

4000

4000

3000

Rated torque (Nm)

0.13

0.19

0.19

0.35

0.64

1.15

1.53

1.91

Peak torque (Nm)
Rotor inertia(× 10 -4 kg･m 2) (Note)
Motor weight (kg) (Note)

0.76

1.2

1.8

3.4

5.4

9.8

12

16.7

0.084

0.108

0.22

0.37

1.47

2.7

5

6

0.4

0.5

0.8

0.85

1.8

2.5

3.4

4.1

(Note) Value of motor only

3. Features

simultaneously, and we devised manufacturing technologies
to ensure stable performance.

3.1 Reduction of cogging torque

The magnet and armature core shapes were designed

Cogging torque causes speed to fluctuate when motors

to minimize cogging torque while maintaining torquerotate, and vibration and noise in machinery. Cogging

characteristics. Specifically, we determined the pole arc

torque has been significantly reduced on the new model toangle that optimizes the magnet’s inner and outer radii andhelp improve performance of customers’ equipment.

minimizes cogging torque, as shown in Figure 4. In addition

Figure 3 shows a comparison of cogging torque waveforms.

to devising a method for laminating electromagnetic steel

With the new model, cogging torque for both sizes has beenplates, we introduced a technique for automating magnet

reduced by more than half compared to our current model.

attachment. We applied our knowledge of manual assembly

For the new model, from the initial development phase,to automated assembly, and developed manufacturing

product design and production line design were advanced

technologies to stably minimize cogging torque.

Rotation angle

New model (KA511)

Rotation angle

Current model (T730)

New model (KA730)

Rotation angle

Fig. 3 Comparison of cogging torque waveforms

41

SANYO DENKI Technical Report No.48 November 2019

Cogging torqueNew model (KA406)

Current model (T511)

Cogging torque

Current model (T406)

Cogging torque

Cogging torque42 × 42 mm 60 W
Current model (T850)

New model (KA850)

Rotation angle

SANMOTION K Series DC Servo Motor

Current model
100%

New model
100%
75%

69%
r
er

ut
O

Pole arc angle
s

s
iu
ad

iu

r

ne

d
ra

In

Loss

Fig. 4 Magnet shape

3.2 Improved efficiency and low heatgeneration due to reduced loss
Generally, increasing the winding space factor within a

Frame temperature rise

Note: Test conditions: Rated output(according to in-house heat dissipation conditions)Fig. 6 Comparison of loss and temperature rise values(42 × 42 mm 60 W motors, at rated output)

3.3 Low noise

slot can reduce copper loss. Moreover, in DC motors there

A structural feature of DC servo motors is that theyis mechanical loss that occurs with the mechanical sliding

have a mechanical sliding portion consisting of brushesof the brushes and commutators. For the new model, weand commutators. The vibrations from the brush andhave increased the winding space factor to reduce copper

commutator contact is one of the main causes of noise

loss, and optimized the material and number of brushes,

during motor rotation.

consequently reducing mechanical loss.

For the new model, vibrations and noise caused by brushAs one example, Figure 5 shows a comparison of theand commutator contact have been suppressed and noise

armature windings for the 54 × 54 mm 110 W model. For thelevels have been reduced by optimizing the number of

new model, innovations include using a nozzle-type coil winding

brushes and improving the rigidity of the bracket portion

machine and the control method thereof, and we reduced

that supports the brushes.

copper loss by using thick windings with a high space factor.

Figure 7 is a comparison of noise levels for 54 × 54 mm 110
W models. For the new model noise is lower across a wide
rotational speed range. Compared to the current model,
noise has been reduced by up to around 8 dB.
The low noise levels of the new model allow it to be usedcomfortably near people, such as in medical equipment.

(a) Current model(b) New model

Current modelFig. 5 Comparison of armature windings(54 × 54 mm 110 W motors)

between brushes and commutators while maintaining
equivalent brush life to the current model.
Figure 6 shows a comparison of loss and frame temperature

Noise level (dB)Moreover, by optimizing the number and material ofbrushes, we have reduced mechanical loss from friction

New model

5dB

rise between the new and current 42 × 42 mm 60 W models.
In line with a 31% reduction in loss compared to the current
model, frame temperature rise has been reduced by 25%.
Also, motor efficiency has been improved by around 10%.
This high efficiency limits temperature rise, so it has little
impact on the temperature of customers’ equipment, andcontributes to energy-saving in equipments.

Speed（min-1）

Fig. 7 Noise level comparison(54 × 54 mm 110 W motors, no-load)

SANYO DENKI Technical Report No.48 November 201942

SANMOTION K Series DC Servo Motor

4. Conclusion
This article has introduced the lineup, specifications, andAtsuko Kubo
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

features of the SANMOTION K series DC servo motor.
The new model features high efficiency, low torquefluctuation, and low motor temperature rise. Moreover,a low-voltage model has been added to the standard

Chieko Hoyano
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

lineup. This product can help improve the performance ofcustomers’ equipment and create new value. Because the

Yuki Onda

mounting size of the new model is the same as our current

Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

model, they can easily replace the current model customers
have been using .
We will continue to pursue the ease-of-use unique to
DC servo motors, and meet the needs of current and new
applications and markets by combining product design and

Kenta Matsushima
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

manufacturing technologies.

Atsushi Takijima
Reference(1) SANYO DENKI: Integrated Report 2019

Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

https://contents.xj-storage.jp/xcontents/AS02420/2787a71d/559
4/4b43/9500/15afbd070ab3/20190820115838915s.pdf

Masaaki Yamaguchi

pp13-14 (2019.8.20)

Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

Authors

Daigo Kuraishi
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

Hidetoshi Hayashi
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

Yuji Yamamoto
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

Toshiya Miyashita
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

Takeshi Miura
Servo Systems Div., Design Dept. 1
Works on the design and development of servo motors.

Shogo Yoda
Servo Systems Div., Design Dept. 1
Works on the design and development of stepping motors.

43

SANYO DENKI Technical Report No.48 November 2019

COLUMN
Cover image:

Ueda Works
1960

Before daybreak on June 4, 1960, a fire broke out at Ueda Works.
Fanned by a strong wind, the fire engulfed and destroyed the wooden
main factory building and production facilities. Our company lost its
main factory and suddenly faced an existential crisis, but all
employees, led by the president, worked together to restore theirworkplaces. As a result, the factory was restored in only two months.
This incident led to the replacement and expansion of our production
facilities. Together with Kawaguchi Works that was completed aroundthe same period, our production capacity was greatly increased.
Following reconstruction, large power supplies were mainly
produced at Ueda Works, including AC uninterruptible power supplies,
high-frequency motor generators, and constant-voltage constant-frequency
power supplies. Demand for uninterruptible power supplies increasedin various industries such as national rail, electric power generation,and petrochemical. Moreover, we further expanded into new markets
such as for computers and broadcast stations.

48

November
2019

https://www.sanyodenki.com

Published in Japan on November 15, 2019, by SANYO DENKI CO., LTD.
Published semi-yearly
3-33-1 Minami-Otsuka, Toshima-ku, Tokyo 170-8451, Japan
Phone +81 3 5927 1020
Publisher Shigeo Yamamoto
Editorial Board Members:
Nobumasa Kodama
Editor-in-Chief
Satoru Onodera
Managing Editor
Takashi Kobayashi
Secretariat
Shiho Tsukada
Secretariat
Kenta Nishimaki
Haruhisa Maruyama
Masakazu Uchida
Hirofumi Nishizawa
Hideki Netsu
Daigo Kuraishi
Hiroshi Miyazaki
Rieko Komine
Copyright © 2019 SANYO DENKI CO., LTD.
All rights reserved.
No part of this publication may be reproduced in any manner whatsoever without written
permission from SANYO DENKI.
All company and product names used in this publication are trademarks or registeredtrademarks of their respective companies.

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